The Siemens 6ES7922-3BJ00-0AN0 is a pre-assembled front connector MTA (Marshalling Terminal Assembly) cable assembly, purpose-built for the SIMATIC S7-300 PCS7 system. It mates a 40-pole front connector (type 6ES7392-1AM00-0AA0) on the S7-300 side to a 25-pole D-SUB socket for an ET200M remote I/O station. The round cable is 8 m long, with a black PVC sheath, 0.5 mm² conductors, and an outer diameter of 10.6 mm. Rated for 24 V and a maximum of 30 V, it handles digital signal transmission only — no analog signals pass through this assembly.
The 30 V maximum and 24 V rated value are the voltage limits for the signal conductors — this is not a power cable. The 0.5 mm² conductor cross-section is sized for 24 V digital I/O signals typical of S7-300 and ET200M modules. The 8 m length covers most panel-to-field-junction distances in a PCS7 marshalling cabinet; if your run is longer, this assembly won't stretch. The 40-pole front connector matches the standard S7-300 40-pin I/O module footprint — no adapter needed.
Installation notes
The cable is round with a black PVC sheath — route it through standard cable glands. The connector strip is field-side; the screw-type terminal enclosure is on the S7-300 side. The 40 channels are all digital — no analog signal transmission, so do not use this assembly for analog I/O modules (use a shielded twisted-pair cable instead).